### Abstract

This paper investigates the resource allocation for two-way relay networks with symmetric data rates from an information theoretic perspective, where a round of information exchange between two sources requiring equal end-to-end transmission rates is considered to be completed by a muti-access (MAC) phase and a broadcast (BC) phase. Decode-and forward (DF) protocol is employed. In this case, we formulate an optimization problem to maximize the sum rate of the system under total available energy. Our goal is to seek the jointly optimized time assignment between the MAC and BC phases and the power allocation among the source and relay nodes. Since the problem is difficult to solve in general, we firstly discuss it in two extreme cases by considering very low and very high system available energy. By doing so, we find an interesting result that in the very high energy case, the optimal ratio of the time assigned for the MAC phase to that assigned for the BC phase is a constant, i.e., 2 : 1. Further, we adopt such constant time assignment to general cases, and derive a closed-form power allocation for two-way relay transmissions. Extensive numerical results vitiated the proposed joint resource allocation and show that the maximum system sum-rate can be approached by our scheme, which obviously excels traditional equal time assignment and equal power distribution schemes.

Original language | English |
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Title of host publication | 2013 IEEE International Conference on Communications, ICC 2013 |

Publisher | Institute of Electrical and Electronics Engineers Inc. |

Pages | 6060-6064 |

Number of pages | 5 |

ISBN (Print) | 9781467331227 |

DOIs | |

Publication status | Published - 2013 |

Externally published | Yes |

Event | 2013 IEEE International Conference on Communications, ICC 2013 - Budapest, Hungary Duration: 9 Jun 2013 → 13 Jun 2013 |

### Other

Other | 2013 IEEE International Conference on Communications, ICC 2013 |
---|---|

Country | Hungary |

City | Budapest |

Period | 9/6/13 → 13/6/13 |

### Fingerprint

### ASJC Scopus subject areas

- Computer Networks and Communications
- Electrical and Electronic Engineering

### Cite this

*2013 IEEE International Conference on Communications, ICC 2013*(pp. 6060-6064). [6655571] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ICC.2013.6655571

**Resource allocation for two-way relay networks with symmetric data rates : An information theoretic approach.** / Xiong, Ke; Shi, Qing; Fan, Pingyi; Letaief, Khaled.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

*2013 IEEE International Conference on Communications, ICC 2013.*, 6655571, Institute of Electrical and Electronics Engineers Inc., pp. 6060-6064, 2013 IEEE International Conference on Communications, ICC 2013, Budapest, Hungary, 9/6/13. https://doi.org/10.1109/ICC.2013.6655571

}

TY - GEN

T1 - Resource allocation for two-way relay networks with symmetric data rates

T2 - An information theoretic approach

AU - Xiong, Ke

AU - Shi, Qing

AU - Fan, Pingyi

AU - Letaief, Khaled

PY - 2013

Y1 - 2013

N2 - This paper investigates the resource allocation for two-way relay networks with symmetric data rates from an information theoretic perspective, where a round of information exchange between two sources requiring equal end-to-end transmission rates is considered to be completed by a muti-access (MAC) phase and a broadcast (BC) phase. Decode-and forward (DF) protocol is employed. In this case, we formulate an optimization problem to maximize the sum rate of the system under total available energy. Our goal is to seek the jointly optimized time assignment between the MAC and BC phases and the power allocation among the source and relay nodes. Since the problem is difficult to solve in general, we firstly discuss it in two extreme cases by considering very low and very high system available energy. By doing so, we find an interesting result that in the very high energy case, the optimal ratio of the time assigned for the MAC phase to that assigned for the BC phase is a constant, i.e., 2 : 1. Further, we adopt such constant time assignment to general cases, and derive a closed-form power allocation for two-way relay transmissions. Extensive numerical results vitiated the proposed joint resource allocation and show that the maximum system sum-rate can be approached by our scheme, which obviously excels traditional equal time assignment and equal power distribution schemes.

AB - This paper investigates the resource allocation for two-way relay networks with symmetric data rates from an information theoretic perspective, where a round of information exchange between two sources requiring equal end-to-end transmission rates is considered to be completed by a muti-access (MAC) phase and a broadcast (BC) phase. Decode-and forward (DF) protocol is employed. In this case, we formulate an optimization problem to maximize the sum rate of the system under total available energy. Our goal is to seek the jointly optimized time assignment between the MAC and BC phases and the power allocation among the source and relay nodes. Since the problem is difficult to solve in general, we firstly discuss it in two extreme cases by considering very low and very high system available energy. By doing so, we find an interesting result that in the very high energy case, the optimal ratio of the time assigned for the MAC phase to that assigned for the BC phase is a constant, i.e., 2 : 1. Further, we adopt such constant time assignment to general cases, and derive a closed-form power allocation for two-way relay transmissions. Extensive numerical results vitiated the proposed joint resource allocation and show that the maximum system sum-rate can be approached by our scheme, which obviously excels traditional equal time assignment and equal power distribution schemes.

UR - http://www.scopus.com/inward/record.url?scp=84891365509&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84891365509&partnerID=8YFLogxK

U2 - 10.1109/ICC.2013.6655571

DO - 10.1109/ICC.2013.6655571

M3 - Conference contribution

AN - SCOPUS:84891365509

SN - 9781467331227

SP - 6060

EP - 6064

BT - 2013 IEEE International Conference on Communications, ICC 2013

PB - Institute of Electrical and Electronics Engineers Inc.

ER -